Neytiri, voiced by actress Zoe Saldana, and Jake, voiced by Sam Worthington, are shown in this scene from 'Avatar,' directed by James Cameron. The film was nominated on Tuesday for the Oscar for Best Picture as well as awards for Achievement in cinematography and Achievement in directing. 20th Century Fox/AP
Actress Anne Hathaway (l.) and Academy of Motion Picture Arts and Sciences President Tom Sherak announce the nominations for Best Picture during the 82nd Annual Academy Awards nominee announcements in Beverly Hills, Calif., on Tuesday. Danny Moloshok/Reuters
Actor George Clooney is shown in a scene from the film 'Up in the Air.' Clooney was nominated for Best Actor for his role in the film, which was also nominated for Best Picture. Dale Robinette/Paramount Pictures/Reuters
Quint Aaron and Sandra Bullock are shown in a scene from 'The Blind Side,' which was nominated for Best Picture on Tuesday. Ralph Nelson/Warner Bros./AP
Director Kathryn Bigelow is seen on the set of her film 'The Hurt Locker.' Bigelow was nominated for the Oscar for Best Director. Jonathan Olley/Summit Entertainment/Reuters
Characters from the animated feature film 'Up' are seen here. The film was nominated for Best Picture on Tuesday. Walt Disney Pictures/Reuters
Actor Morgan Freeman is shown in a scene from 'Invictus.' Freeman was nominated for Best Actor for his role in the film. Keith Bernstein/Warner Bros. Pictures/Reuters
Director Quentin Tarantino is seen on the set of his film 'Inglorious Basterds.' Tarantino was nominated for Best Director for the film. Francois Duhamel/The Weinstein Company/Reuters
Mr. Fox from the film 'Fantastic Mr. Fox,' is seen here. The movie was nominated by the Academy for Best Animated Feature. Fox Searchlight/AP
Actor Colin Firth is shown in a scene from 'A Single Man.' Firth was nominated for Best Actor for his role. Eduard Grau/The Weinstein Company/Reuters
Nominees for Best Actress and Best Actor - Clockwise from top left: Meryl Streep for 'Julie & Julia,' Helen Mirren for 'The Last Station,' Gabourey Sidibe for 'Precious,' Carey Mulligan for 'An Education,' Sandra Bullock for 'The Blind Side,' Colin Firth for 'A Single Man,' George Clooney for 'Up in the Air,' Morgan Freeman for 'Invictus,' Jeff Bridges for 'Crazy Hear,' and Jeremy Renner for 'The Hurt Locker.' Reuters/FILES
Nominees for Best Supporting Actress and Best Supporting Actor: Clockwise from top left: Anna Kendrick for 'Up in the Air,' Maggie Gyllenhaal for 'Crazy Heart,' Penelope Cruz for 'Nine,' Mo 'Nique for 'Precious,' Vera Farmiga for 'Up in the Air,' Woody Harrelson for 'The Messenger,' Christopher Plummer for 'The Last Station,' Christoph Waltz for 'Inglorious Basterds,' Matt Damon for 'Invictus,' and Stanley Tucci for 'The Lovely Bones.' Reuters/FILES
A scene from the German film, 'The White Ribbon,' is seen here. The film was nominated for Best Foreign Language Film for the 82nd Academy Awards. Films du Losange/Sony Pictures Classics/Reuters
Actors Jeff Bridges (l.) and Robert Duvall are shown in a scene from 'Crazy Heart.' Lorey Sebastian/Fox Searchlight Pictures/Reuters
Carey Mulligan (l.) and Peter Sarsgaard are seen in 'An Education.' Kerry Brown/Sony Pictures Classics/Reuters
Director James Cameron poses for photographers prior to the opening of the movie 'Avatar' in Davos, Switzerland, on Jan. 28. Cameron's 'Avatar' leads the Academy Awards with 'The Hurt Locker' at nine nominations apiece. Virginia Mayo/AP
Actress Dame Helen Mirren is seen in 'The Last Station.' Stephan Rabold/Sony Pictures Classics/Reuters
Fred Melamed (l.) and Sari Lennick are shown in a scene from 'A Serious Man,' which was nominated for Best Picture on Tuesday. Wilson Webb/Focus Features/Reuters
A scene from the film 'District 9,' is shown here. TriStar Pictures/Reuters
Characters from the animated film 'The Secret of Kells,' are shown here. 'The Secret of Kells' was nominated for Best Animated Feature Film in the 82nd Academy Awards, which will be presented on March 7.
In a country steeped in a history of coups, bloodshed caused by politics, ethnicity, land disputes and, lately, the Boko Haram Islamic uprising, the election is important as Africa's most populous nation consolidates its democracy.
ByMichelle Faul, Associated Press
Nigeria's President Goodluck Jonathan urged his nation to vote peacefully and accept the results of Saturday's presidential elections, which analysts say will be the most tightly contested in the history of Africa's richest nation and its largest democracy.